LLVM 20.0.0git
WebAssemblySubtarget.cpp
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1//===-- WebAssemblySubtarget.cpp - WebAssembly Subtarget Information ------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8///
9/// \file
10/// This file implements the WebAssembly-specific subclass of
11/// TargetSubtarget.
12///
13//===----------------------------------------------------------------------===//
14
19using namespace llvm;
20
21#define DEBUG_TYPE "wasm-subtarget"
22
23#define GET_SUBTARGETINFO_CTOR
24#define GET_SUBTARGETINFO_TARGET_DESC
25#include "WebAssemblyGenSubtargetInfo.inc"
26
28WebAssemblySubtarget::initializeSubtargetDependencies(StringRef CPU,
29 StringRef FS) {
30 // Determine default and user-specified characteristics
31 LLVM_DEBUG(llvm::dbgs() << "initializeSubtargetDependencies\n");
32
33 if (CPU.empty())
34 CPU = "generic";
35
36 ParseSubtargetFeatures(CPU, /*TuneCPU*/ CPU, FS);
37 return *this;
38}
39
41 const std::string &CPU,
42 const std::string &FS,
43 const TargetMachine &TM)
44 : WebAssemblyGenSubtargetInfo(TT, CPU, /*TuneCPU*/ CPU, FS),
45 TargetTriple(TT), InstrInfo(initializeSubtargetDependencies(CPU, FS)),
46 TLInfo(TM, *this) {}
47
49 // If atomics are disabled, atomic ops are lowered instead of expanded
50 return hasAtomics();
51}
52
54 // Disable the MachineScheduler for now. Even with ShouldTrackPressure set and
55 // enableMachineSchedDefaultSched overridden, it appears to have an overall
56 // negative effect for the kinds of register optimizations we're doing.
57 return false;
58}
59
60bool WebAssemblySubtarget::useAA() const { return true; }
#define LLVM_DEBUG(X)
Definition: Debug.h:101
This file contains the WebAssembly implementation of the TargetInstrInfo class.
This file provides WebAssembly-specific target descriptions.
This file declares the WebAssembly-specific subclass of TargetSubtarget.
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:50
constexpr bool empty() const
empty - Check if the string is empty.
Definition: StringRef.h:134
Primary interface to the complete machine description for the target machine.
Definition: TargetMachine.h:77
Triple - Helper class for working with autoconf configuration names.
Definition: Triple.h:44
bool enableAtomicExpand() const override
bool enableMachineScheduler() const override
WebAssemblySubtarget(const Triple &TT, const std::string &CPU, const std::string &FS, const TargetMachine &TM)
This constructor initializes the data members to match that of the specified triple.
void ParseSubtargetFeatures(StringRef CPU, StringRef TuneCPU, StringRef FS)
Parses features string setting specified subtarget options.
This is an optimization pass for GlobalISel generic memory operations.
Definition: AddressRanges.h:18
raw_ostream & dbgs()
dbgs() - This returns a reference to a raw_ostream for debugging messages.
Definition: Debug.cpp:163